CN218629571U - A device for timber appearance imperfections detects - Google Patents
A device for timber appearance imperfections detects Download PDFInfo
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- CN218629571U CN218629571U CN202222604477.3U CN202222604477U CN218629571U CN 218629571 U CN218629571 U CN 218629571U CN 202222604477 U CN202222604477 U CN 202222604477U CN 218629571 U CN218629571 U CN 218629571U
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Abstract
The application relates to a device for detecting appearance defects of wood, which belongs to the technical field of wood processing, and is arranged at the front end of a conveyor belt for feeding wood cutting equipment; the device comprises: the setting is in image acquisition module directly over the conveyer belt sets up the illumination module of the oblique upside of conveyer belt, and the level sets up the photoelectric sensor of conveyer belt one side to and set up and be in near industry control computer and the power module of conveyer belt: the image acquisition module is respectively and electrically connected with the industrial control computer and the photoelectric sensor, and the power supply module supplies power to the device. The technical scheme of this application can effectively promote defect detection's in the wood working process efficiency, reduces the cost of labor.
Description
Technical Field
The application belongs to the technical field of wood processing, concretely relates to a device for timber appearance imperfections detects.
Background
With the maturity of machine vision technology, in the automatic production and manufacturing process, the appearance detection by using the machine vision technology becomes a general technology. In the technical field of wood processing, in the related art, a related vision detection system usually detects a finished product at the rear end, and even if a defect is found, the finished product can only be manually removed or the whole product is scrapped.
And in actual plank production process, need detect node, hole, gap on the location timber, rot, discolour (the collective name is the knot that dies), it is artifical and detect and mark on timber through the highlighter at present that the measurement personnel is later by back end cutting process to cutting out the identification mark thing, this kind of mode inefficiency, the cost of labor height.
SUMMERY OF THE UTILITY MODEL
For overcoming the problem that exists in the correlation technique at least to a certain extent, this application provides a device for timber appearance imperfections detects to solve the technical problem that defect detection link is efficient, the cost of labor is high in the actual plank production process.
In order to achieve the purpose, the following technical scheme is adopted in the application:
the application provides a device for detecting appearance defects of wood, which is arranged at the front end of a conveyor belt for feeding wood cutting equipment;
the device comprises an image acquisition module arranged right above the conveyor belt, an illumination module arranged on the inclined upper side of the conveyor belt, a photoelectric sensor horizontally arranged on one side of the conveyor belt, and an industrial control computer and a power supply module which are arranged near the conveyor belt;
the image acquisition module is respectively and electrically connected with the industrial control computer and the photoelectric sensor, and the power supply module supplies power to the device.
Alternatively,
the lighting module is two strip-shaped lighting lamps, and the length directions of the two strip-shaped lighting lamps are parallel to the conveyor belt;
the two strip-shaped illuminating lamps are respectively arranged on the left and right inclined upper sides of the conveyor belt, and the light emitting directions of the strip-shaped illuminating lamps respectively point to the conveyor belt.
Alternatively,
the vertical distance between the image acquisition module and the conveyor belt is a first distance;
the distance between the mounting axial positions of the two strip-shaped illuminating lamps and the conveyor belt is a second distance, and the vertical distance between the two strip-shaped illuminating lamps and the conveyor belt is a third distance;
the first distance, the second distance, the third distance and the size of the strip-shaped illuminating lamp are determined based on the size of the wood.
Optionally, the length dimension of the timber is 600mm at most, and the width dimension is 50mm;
the first distance is 550mm, and the second distance and the third distance are both 300mm;
the length dimension of strip light is 1000mm, and the width dimension is 50mm.
Optionally, the strip-shaped LED illuminating lamp is an LED lamp.
Optionally, the image capture module is a global shutter color industrial camera.
Optionally, the probe mounting position of the photoelectric sensor is located at the edge of the collection range of the image collection module and is located on one side of the advancing direction of the conveyor belt.
Optionally, the photosensor is an NPN type photosensor.
This application adopts above technical scheme, possesses following beneficial effect at least:
according to the technical scheme, the device for detecting the appearance defects of the wood is arranged at the front end of a conveyor belt for feeding the wood cutting equipment; the device comprises an image acquisition module arranged right above a conveyor belt, an illumination module arranged on the inclined upper side of the conveyor belt, a photoelectric sensor horizontally arranged on one side of the conveyor belt, an industrial control computer and a power supply module which are arranged near the conveyor belt; the image acquisition module is respectively and electrically connected with the industrial control computer and the photoelectric sensor, and the power supply module supplies power to the device. According to the technical scheme, based on the existing machine vision method, in a wood processing scene, the integrated device for detecting the appearance defects of the wood is specifically arranged at the front end of the conveying belt to realize the defect detection, so that the efficiency of the defect detection in the wood processing process can be effectively improved, and the labor cost is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the technology or prior art of the present application and are incorporated in and constitute a part of this specification. The drawings expressing the embodiments of the present application are used for explaining the technical solutions of the present application, and should not be construed as limiting the technical solutions of the present application.
FIG. 1 is a schematic structural illustration of a device for detecting apparent defects of wood provided by one embodiment of the application;
fig. 2 is a schematic diagram of an electrical connection block diagram of a device for detecting appearance defects of wood according to an embodiment of the application.
In the figure, 10-conveyor belt; 20-an image acquisition module; 30-a lighting module; 40-a photosensor; 50-an industrial control computer; 60-power module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
As described in the background, as machine vision technology matures, the use of machine vision technology for appearance inspection becomes a common technique in automated manufacturing processes. In the technical field of wood processing, in the related art, a related vision detection system usually detects a finished product at the rear end, and even if a defect is found, the finished product can only be manually removed or the whole product is scrapped.
In the actual wood board production process, detection is needed at the front end of production, namely in the initial production and manufacturing process, and defects are found so as to be removed in time. Specifically, the defects mainly refer to nodes, holes, gaps, rot, discoloration (collectively referred to as dead knots) and the like on the wood, and the defects need to be positioned for removing. At present, the detection personnel manually detect and mark on wood through a highlighter, and then identify the marker by a back-end cutting process and cut, but the mode is easy to miss detection (such as manual long-time work and missed detection caused by fatigue), the labor cost is high and the efficiency is low, and the production efficiency of the assembly line operation mode is influenced.
The above problems are discovered by the applicant through studying the front-end production process of specific wood board processing operation, in summary, in the wood board production, different types of timbers need to be conveyed to a cutting machine through a conveying belt to be cut so as to eliminate scar knots, edge breakage, bevel edges and the like, and then the subsequent steps such as manual finishing and the like are carried out, and the problem of low efficiency of a defect detection link exists in the process. To this, this application provides a device for timber appearance imperfections detects, carries out the secondary to this section technology link and reforms transform to be favorable to realizing the promotion of production operation degree of automation, reduce the cost of labor, improve holistic operating efficiency.
In one embodiment, as shown in fig. 1 and 2, the device for detecting the appearance defects of the timbers is arranged at the front end of a conveyor belt 10 feeding a timber cutting device;
the device comprises an image acquisition module 20 arranged right above a conveyor belt 10, an illumination module 30 arranged on the inclined upper side of the conveyor belt 10, a photoelectric sensor 40 horizontally arranged on one side of the conveyor belt 10, and an industrial control computer 50 and a power supply module 60 (not shown in figure 1) arranged near the conveyor belt 10:
as shown in fig. 2, the image capturing module 20 is electrically connected to the industrial control computer 50 and the photoelectric sensor 40, respectively, and the power module 60 supplies power to the device.
In the technical scheme of the application, the image acquisition module 20 is used for acquiring images of conveyed wood; the illumination module 30 is used for providing illumination conditions for image acquisition;
the photoelectric sensor 40 is used for generating a trigger signal for image acquisition; the industrial control computer 50 is loaded with a related machine vision program, and can realize the detection of the appearance defects of the wood based on the images, and it should be noted here that the principle of the method for performing the appearance detection based on the machine vision technology in the technical field belongs to the existing general technology, and the technical scheme of the application does not relate to the improvement of the related realization method.
In practical application, the industrial control computer outputs result data (for example, displays and outputs) when the defect detection is realized, and a rear-end operator can perform targeted cutting according to the result data to eliminate defects such as knots, broken edges, bevel edges and the like, so that the whole process of the production and processing of the wood board is realized.
Further, for example, in an application scenario, based on specific configuration, the cutting device at the rear end may also perform automatic linkage based on the output result data, thereby further reducing manual intervention and improving operation efficiency.
According to the technical scheme, based on the existing machine vision method, in a wood processing scene, the integrated device for detecting the appearance defects of the wood is arranged at the front end of the conveying belt, so that the efficiency of detecting the defects in the wood processing process can be effectively improved, and the labor cost is reduced.
To facilitate understanding of the technical solutions of the present application, the technical solutions of the present application will be described below with reference to another embodiment.
As shown in fig. 1 and 2, in this embodiment, as well, the device for detecting the appearance defects of the wood is arranged at the front end of a conveyor belt 10 feeding the wood cutting equipment;
the device includes, sets up the image acquisition module 20 directly over conveyer belt 10, sets up the illumination module 30 at the oblique upside of conveyer belt 10, and the level sets up the photoelectric sensor 40 in conveyer belt 10 one side, still includes industrial control computer 50 and power module 60:
the image acquisition module 20 is electrically connected with the industrial control computer 50 and the photoelectric sensor 40 respectively, and the power supply module 60 supplies power to the device.
Specifically, in this embodiment, the image capturing module 20 is a global shutter color industrial camera, such as a CCD sensor-based global shutter color industrial camera;
generally speaking, industrial cameras can be divided into various types, and in consideration of the fact that wood boards are dark or light in color and lean towards yellow, a color industrial camera is adopted;
different from stationary detection in a rear-end process, the wood feeding speed is high on the front-end site, the speed is usually about 1.5m/s, and a global shutter camera needs to be selected for data acquisition in order to adapt to the speed, so that the smear caused by too high speed is avoided.
The scene is also different from the scene at the back end, the detection range is often large in the back end process, and the camera needs to be moved to carry out overall detection by shooting local parts for multiple times; in the present application, for efficiency, the timber needs to be completely photographed at a time, in practical implementation, the image acquisition module is installed and fixed directly above the timber conveyor belt, and the vertical distance between the image acquisition module and the conveyor belt is a first distance, which is determined based on the size of the timber, for example, in this embodiment, considering that the length dimension of the timber is about 600mm at most and the width dimension of the timber is 50mm, the first distance is 550mm, that is, the installation height of the industrial camera is about 550mm from the timber.
As shown in fig. 1 and 2, in this embodiment, an illumination module 30, which is disposed on an oblique upper side of the conveyor belt 10, is used to provide an illumination condition for image acquisition.
In an actual application scene, the wood moving speed is high, so that after the global shutter camera is selected, the exposure time of the camera is short, and in order to effectively distinguish defects and improve the acquisition quality, the illumination module 30 needs to be specifically configured to ensure the illumination condition;
specifically, as shown in fig. 1, in this embodiment, the lighting module 30 is a two-bar lighting lamp (for example, an LED lamp is used as a lighting lamp), and the length direction of the two-bar lighting lamp is parallel to the conveyor belt; the two strip-shaped illuminating lamps are respectively arranged on the left and right oblique upper sides of the conveyor belt, and the light emitting directions respectively point to the conveyor belt;
the brighter the illuminating lamp is, the better the illuminating lamp needs to be after factors such as heat dissipation are considered, for example, a 20w LED illuminating lamp is selected;
in practical implementation, as shown in the installation form of fig. 1, light is emitted from the light-emitting surface of the illuminating lamp, obliquely and downwards irradiates on the surface of the wood, and enters the collected camera through diffuse reflection on the surface of the wood.
In this embodiment, the distance between the installation axial positions of the two strip-shaped illuminating lamps and the conveyor belt is a second distance, and the vertical distance (which is the distance perpendicular to the horizontal direction) between the two strip-shaped illuminating lamps and the conveyor belt is a third distance, it is easy to understand that the specific values of the second distance and the third distance and the size of the strip-shaped illuminating lamps are influenced by the size of actual wood and the size of equipment (essentially, the size of the equipment is determined based on the size of the wood), that is, the second distance, the third distance and the size of the strip-shaped illuminating lamps are also determined based on the size of the wood;
in this embodiment, as mentioned above, the length of the wood is about 600mm at most, the width is 50mm, the length of the strip-shaped lighting lamp is 1000mm in consideration of the light energy attenuation, the width of the strip-shaped lighting lamp is 50mm, the second distance and the third distance are both 300mm, and the light-emitting surface of the strip-shaped lighting lamp is inclined downward by about 45 °.
In this embodiment, as shown in fig. 1, the photoelectric sensor 40 is horizontally disposed at one side of the conveyor belt, and is used for generating a trigger signal for image acquisition;
in the application scenario of the present application, as mentioned above, the feeding speed is relatively fast; in this case, the image acquisition correspondingly adopts a trigger mode, that is, one piece of wood acquires one image for data processing, and in order to ensure the acquisition accuracy, photoelectric triggering (the photoelectric triggering has strong anti-interference performance and is not easy to cause false triggering) is selected, and the photoelectric triggering is performed by a photoelectric sensor 40 with a faster response speed, for example, an NPN-type photoelectric sensor with a response speed of 1ms is adopted;
in this embodiment, the trigger requirement does, the camera need trigger the collection after the plank gets into the camera shooting range, and no matter the plank is long, the deformity all has certain height, consequently can install photoelectric sensor at the side, whether have to shelter from through the response altitude range and judge whether there is timber to pass through, and the mounted position is at the marginal position of camera shooting range and conveyer belt direction of advance, timber gets into the shooting range completely like this, and trigger photoelectric sensor to gather when leaving the shooting range soon, thereby can effectually utilize and shoot the space, guarantee simultaneously that timber can shoot completely, the hourglass is taken can not appear, this embodiment, as shown in fig. 1, photoelectric sensor 40's probe mounted position is located the collection scope edge of industrial camera (image acquisition module), and is in conveyer belt direction of advance one side.
Specifically, in the embodiment, the industrial control computer adopts a micro-host, which is beneficial to saving space; as a specific implementation mode, the industrial control computer realizes the detection of the appearance defects of the timber based on the collected images, and can send result data to a controller of the rear-end cutting equipment through a net port so as to automatically cut the timber, the whole response process is not more than 200ms and is far less than the actual material loading rhythm, and the smooth proceeding of the whole operation can be ensured.
In the technical scheme, the device for detecting the appearance defects of the wood is arranged at the front end of a conveyor belt for feeding the wood cutting equipment; the device includes, sets up the image acquisition module directly over the conveyer belt, sets up the illumination module at the oblique upside of conveyer belt, and the level sets up the photoelectric sensor in conveyer belt one side to and set up industrial control computer and the power module near the conveyer belt: the image acquisition module is respectively and electrically connected with the industrial control computer and the photoelectric sensor, and the power supply module supplies power to the device. According to the technical scheme, based on the existing machine vision method, in a wood processing scene, the integrated device for detecting the appearance defects of the wood is specifically arranged at the front end of the conveying belt to realize the defect detection, so that the efficiency of the defect detection in the wood processing process can be effectively improved, and the labor cost is reduced.
By applying the technical scheme, manual detection, line drawing and positioning can be effectively replaced, comparison is performed in a 24-hour working system, the line drawing and positioning device can replace 6 people's stations to detect in practical application, the precision and the reliability are far superior to those of manual detection, and the detection quality and efficiency which are far higher than those of manual detection are realized. From the process flow, the original flow comprises the steps of feeding, finishing, manual marking, discharging and cutting. After the operation flow is optimized by the product, the flow is shortened to arrangement, emptying and cutting, and the overall operation efficiency is effectively improved.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The device for detecting the appearance defects of the wood is characterized by being arranged at the front end of a conveyor belt for feeding wood cutting equipment;
the device includes, the setting is in image acquisition module directly over the conveyer belt, the setting is in the illumination module of the oblique upside of conveyer belt, the level sets up the photoelectric sensor of conveyer belt one side, and set up and be in near industry control computer and the power module of conveyer belt:
the image acquisition module is respectively and electrically connected with the industrial control computer and the photoelectric sensor, and the power supply module supplies power to the device.
2. A device for the detection of visual defects in wood according to claim 1,
the lighting module is two strip-shaped lighting lamps, and the length directions of the two strip-shaped lighting lamps are parallel to the conveying belt;
the two strip-shaped illuminating lamps are respectively arranged on the left and right inclined upper sides of the conveyor belt, and the light emitting directions respectively point to the conveyor belt.
3. A device for the detection of visual defects in wood according to claim 2,
the vertical distance between the image acquisition module and the conveyor belt is a first distance;
the distance between the mounting axial positions of the two strip-shaped illuminating lamps and the conveyor belt is a second distance, and the vertical distance between the two strip-shaped illuminating lamps and the conveyor belt is a third distance;
the first distance, the second distance, the third distance and the size of the strip-shaped illuminating lamp are determined based on the size of the wood.
4. A device for the detection of appearance defects in wood according to claim 3 wherein the wood has a length dimension of up to 600mm and a width dimension of 50mm;
the first distance is 550mm, and the second distance and the third distance are both 300mm;
the length dimension of strip light is 1000mm, and width dimension is 50mm.
5. A device for the detection of wood appearance defects according to claim 2, wherein the strip lights are LED lights.
6. The apparatus for wood appearance defect detection according to claim 2, wherein the image acquisition module is a color industrial camera with a global shutter.
7. The device for detecting the appearance defects of the timbers according to claim 1, wherein the mounting positions of the probes of the photoelectric sensors are positioned at the edge of the acquisition range of the image acquisition module and at one side of the advancing direction of the conveyor belt.
8. A device for the detection of appearance defects in wood according to claim 1, wherein the photoelectric sensor is an NPN-type photoelectric sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222604477.3U CN218629571U (en) | 2022-09-30 | 2022-09-30 | A device for timber appearance imperfections detects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222604477.3U CN218629571U (en) | 2022-09-30 | 2022-09-30 | A device for timber appearance imperfections detects |
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| Publication Number | Publication Date |
|---|---|
| CN218629571U true CN218629571U (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222604477.3U Active CN218629571U (en) | 2022-09-30 | 2022-09-30 | A device for timber appearance imperfections detects |
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| CN (1) | CN218629571U (en) |
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- 2022-09-30 CN CN202222604477.3U patent/CN218629571U/en active Active
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